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Bottlehead Crack 1.1 OTL Headphone Amplifier with Speedball Upgrade Quality Build - Service Price Only by TheHeadAmpBuilder

Wed, 02 Dec 2020 09:31:42 -0500

400.00 USD

*****MADE TO ORDER***** 2 week turnaround time

The price listed is for service only. The kit must be purchased separately. I have Crack + Speedball kits in stock for $335 (this was purchased during the sale so I am offering a discount). You can purchase this from me via PayPal.
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Bottlehead Crack 1.1 with Speedball Upgrade *120V (US)
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Includes Bottlehead Badge, Stock Vacuum Tubes, and Power Cord

A great amount of detail was put into this Bottlehead Crack headphone amplifier. The chassis, transformer, and screws were painted with metallic paint. The wooden base was sanded and stained. It was then finished by hand with special oil with increasing grits of sandpaper between coats to get an ultra smooth finish.

The wiring for this amp was carefully angled to provide a pleasing appearance and to ensure that all wires were connected to their proper terminals. Each terminal was carefully inspected to ensure that all joints were properly soldered. The resistances and voltages were then tested and passed all tests. Finally, I've listened to the amp with my own set up to ensure it was in proper working order.

The Bottlehead Crack is an exceptional headphone amp that pairs well with high impedance headphones such as the Sennheiser HD 650's and the HD 800's. The music really shines with live or acoustic music.

If you have any questions or concerns, please do not hesitate to contact me.

*The amp has a universal transformer. Let me know if you need a voltage other than 120V (US) and I can modify this for you during the building process.
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Shipping and Returns
------------------------------
Shipping will include tracking. The amp will be carefully packed with plenty of cushion and foam.

Buyers will have 30 days to return the amp.

Bottlehead Crack 1.1 OTL Headphone Amplifier with Speedball Upgrade Quality Build - Service Price Only by TheHeadAmpBuilder

Mon, 30 Nov 2020 11:02:07 -0500

400.00 USD

=====MADE TO ORDER==== 2 week turnaround time

The price listed is for service only. The kit must be purchased separately. I have Crack + Speedball kits in stock for $335 (this was purchased during the sale so I am offering a discount). You can purchase this from me via PayPal.
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Bottlehead Crack 1.1 with Speedball Upgrade *120V (US)
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Includes Bottlehead Badge, Stock Vacuum Tubes, and Power Cord

Does not include upgraded power cord ($140 extra)

Made with Cardas Eutectic Solder, the best solder there is

Speak to me about upgrades!
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A great amount of detail was put into this Bottlehead Crack headphone amplifier. The chassis, transformer, and screws were painted with metallic paint. The wooden base was sanded and stained. It was then finished by hand with special oil with increasing grits of sandpaper between coats to get an ultra smooth finish.

The wiring for this amp was carefully angled to provide a pleasing appearance and to ensure that all wires were connected to their proper terminals. Each terminal was carefully inspected to ensure that all joints were properly soldered. The resistances and voltages were then tested and passed all tests. Finally, I've listened to the amp with my own set up to ensure it was in proper working order.

The Bottlehead Crack is an exceptional headphone amp that pairs well with high impedance headphones such as the Sennheiser HD 650's and the HD 800's. The music really shines with live or acoustic music.

If you have any questions or concerns, please do not hesitate to contact me.

*The amp has a universal transformer. Let me know if you need a voltage other than 120V (US) and I can modify this for you free of charge.
------------------------------
Shipping and Returns
------------------------------
Shipping will include tracking. The amp will be carefully packed with plenty of cushion and foam.

Buyers will have 30 days to return the amp.

Bottlehead Crack 1.1 OTL Headphone Amplifier with Speedball Upgrade Quality Build - Service Price Only by TheHeadAmpBuilder

Thu, 26 Nov 2020 10:24:58 -0500

400.00 USD

*****MADE TO ORDER***** 2 week turnaround time

The price listed is for service only. The kit must be purchased separately. I have Crack + Speedball kits in stock for $335 (this was purchased during the sale so I am offering a discount). You can purchase this from me via PayPal.
----------------------------------------------------------
Bottlehead Crack 1.1 with Speedball Upgrade *120V (US)
----------------------------------------------------------
Includes Bottlehead Badge, Stock Vacuum Tubes, and Power Cord

A great amount of detail was put into this Bottlehead Crack headphone amplifier. The chassis, transformer, and screws were painted with metallic paint. The wooden base was sanded and stained. It was then finished by hand with special oil with increasing grits of sandpaper between coats to get an ultra smooth finish.

The wiring for this amp was carefully angled to provide a pleasing appearance and to ensure that all wires were connected to their proper terminals. Each terminal was carefully inspected to ensure that all joints were properly soldered. The resistances and voltages were then tested and passed all tests. Finally, I've listened to the amp with my own set up to ensure it was in proper working order.

The Bottlehead Crack is an exceptional headphone amp that pairs well with high impedance headphones such as the Sennheiser HD 650's and the HD 800's. The music really shines with live or acoustic music.

If you have any questions or concerns, please do not hesitate to contact me.

*The amp has a universal transformer. Let me know if you need a voltage other than 120V (US) and I can modify this for you during the building process.
------------------------------
Shipping and Returns
------------------------------
Shipping will include tracking. The amp will be carefully packed with plenty of cushion and foam.

Buyers will have 30 days to return the amp.

Elekit TU-8600S 300B Power Amplifier / Headphone Amplifier Lundahl Transformers Takman Resistors and TKD Pot - Service Price Only by TheHeadAmpBuilder

Thu, 19 Nov 2020 00:14:32 -0500

800.00 USD

Made to Order, please allow 2 week turnaround

The listed price is for service only. If you would like to purchase the kit please contact me via message or at jimc2487@gmail.com
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Elekit TU-8600 S Version 300B Power Amplifier / Headphone Amplifier

Tubes are not included

Tube Combo in Stock: 2 x Cossor 300B, 2 x RCA Clear Top 12AU7, Genalex 12AX7 - $385

- This tube combo sounds superb for the price and is a good starting point if this is your first 300B tube amp

If you prefer a different tube combo, you can check out your options here: https://www.diyaudio.com/forums/elekit/356044-elekit-tube-set-options.html

Caps are recommended, speak to me about upgrades

The price of the kit is $1,950. I charge $800 to get it built

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The TU-8600 S Version is fully upgraded with Takman resistors, the latest (2020) Lundahl transformers, and TKD attenuator. Capacitor upgrades are available

FEATURES
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POWER CIRCUIT ENHANCEMENT
High efficiency, low magnetic flux leakage R-core transformer
Schottky barrier diodes for shorter recovery time
Individual windings for the filament heater (A power), high voltage (B power), and bias to stabilize the negative feedback circuitry (C power)
All power stabilized to reduce residual noise as much as possible, resulting in a noise level as low as 1/10th of the TU-8300R

STABLE NFB CIRCUIT FOR HIGH QUALITY AUDIO
Improvement to various parts and circuits including OPT to make the most of 300B tubes
NFB applied to cathode of 300B by the third winding of the OPT as well as to the voltage amplifying stage
NFB is minimized as well as transient response

NEW ACTIVE AUTOMATIC BIAS ADJUSTMENT
Bias power is supplied separately
New "Active automatic bias" used where the amp detects plate current and automatically adjusts the grid voltage, rendering the TU-8600 both self-biasing as well as having fixed bias.
Current detecting circuit moved from cathode side to the B power side for better sound quality

FULL POWER USE OF 300B TUBES
Orthodox voltage amplification stage to make the most of the 300B's outstanding sonic characteristics
12AU7 (ECC82) used in parallel for 2nd stage to drive the 300B tubes to full power resulting in 200Vp-p without clipping

TUBE FRIENDLY DESIGN
Warm up times for directly heated and indirectly heated tubes differ. Most designs warm up both at the same rate.
The TU-8600 heats up the directly heated 300B tubes after the indirectly heated 12AU7 / 12AX7 indirectly heated tubes have warmed up.
This is a very tube friendly design that will not overload tubes that have not warmed up fully

OUTPUT LEVEL SECTION FOR HEADPHONES
There are jumpers on the board to allow for headphone impedance matching

DIY FRIENDLY DESIGN
The TU-8600 comes with high quality polymer hybrid electrolytic caps and polypropylene film caps, however extra space has been designed into the PCB for audiophiles to add (larger) after market caps

SPECIFICATIONS

Tubes: 300B x 2, 12AX7x1, 12AU7x2 (TUBES ARE NOT INCLUDED)

Rated output: 9.2W + 9.2W (10% THD)
Rated input: 320mV

Residual noise: 36uV (IHF-A)

Frequency response: 7Hz-40kHz (-3dB)

Input impedance: 50kΩ
Output impedance: 4-6.3Ω, 8-16Ω selectable

Input: Line1 (2 x RCA)
Output: Gold plated speaker output terminals (banana plug compatible)

Power input: 100/115/200/230V 50/60Hz (IEC inlet)
Power Consumption: 90W

Dimensions: 385x217x325mm (including projections)
Weight: ~12.6kg assembled

Bottlehead Mainline Headphone Tube Amplifier Professionally Built All Black with Silver Accents Quality Build - Service Price Only by TheHeadAmpBuilder

Mon, 16 Nov 2020 15:39:31 -0500

1,150.00 USD

----Made to Order, please allow 3 to 4 weeks turnaround time----

Bottlehead Mainline Headphone Amplifier 120V (US, Canada)

The price listed is for service only. The amp must be purchased from Bottlehead and have it shipped to me or you have the option of sending me the funds via PayPal for me to order it for you. You will be in charge of PayPal fees.

Note: Bottlehead is aware of my assembly and woodworking services so there will be no issues getting it shipped to me directly.
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Includes Bottlehead Badge, Stock Vacuum Tubes, and Power Cord

Does not include upgraded power cord ($140 extra)
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A great amount of detail was put into this Bottlehead Mainline headphone amplifier. The chassis and transformer bell end were painted with metallic paint. The wooden base was sanded and stained. It was then finished by hand with special oil with increasing grits of sandpaper between coats. The final coat is finished with my HVLP spray system.

The wiring for this amp was done in a neat manner to provide a pleasing appearance and to ensure that all wires were connected to their proper terminals. Each terminal was carefully inspected to ensure that all joints were properly soldered. The resistances and voltages were then tested and passed all tests. Finally, I've listened to the amp with my own set up to ensure it was in proper working order.

The Bottlehead Mainline can support both high and low impedance headphones. It also has a balanced XLR output if needed. The Mainline comes with a Stepped Attenuator for best performance.

If you have any questions or concerns, please do not hesitate to contact me.

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Shipping and Returns
------------------------------
Shipping will include tracking. The amp will be carefully packed with plenty of cushion and foam.

Buyers will have 30 days to return the amp.

Bottlehead Crack 1.1 OTL Headphone Amplifier with Speedball Upgrade Wiring Only - Service Price Only by TheHeadAmpBuilder

Fri, 13 Nov 2020 14:24:56 -0500

200.00 USD

*****MADE TO ORDER***** 2 day turnaround time

The price listed is for service only. I have Bottlehead Crack + Speedball kits in stock for $335 (includes PayPal fee). It's discounted from the regular price of $425 because I purchased them during the sale.
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Bottlehead Crack 1.1 with Speedball Upgrade *120V (US)
-------------------------------------------------------------------
Includes Bottlehead Badge, Stock Vacuum Tubes, and Power Cord

This Crack is for wiring only (no neat wiring). The base is assembled and sanded.

The Bottlehead Crack is an exceptional headphone amp that pairs well with high impedance headphones such as the Sennheiser HD 650's and the HD 800's. The music really shines with live or acoustic music.

If you have any questions or concerns, please do not hesitate to contact me.

*The amp has a universal transformer. Let me know if you need a voltage other than 120V (US) and I can modify this for you during the building process.
------------------------------
Shipping and Returns
------------------------------
Shipping will include tracking. The amp will be carefully packed with plenty of cushion and foam.

Buyers will have 30 days to return the amp.

Bottlehead Crack 1.1 OTL Headphone Amplifier with Speedball Upgrade Quality Build - Service Price Only by TheHeadAmpBuilder

Wed, 11 Nov 2020 15:43:11 -0500

400.00 USD

Bottlehead Crack 1.1 OTL Headphone Amplifier with Speedball Upgrade Quality Build - Service Price Only by TheHeadAmpBuilder

Tue, 10 Nov 2020 16:21:18 -0500

400.00 USD

*****MADE TO ORDER*****

The price listed is for service only. The kit must be purchased separately. I have Crack + Speedball kits in stock for $335 (this was purchased during the sale so I am offering a discount). You can purchase this from me via PayPal.
-----------------------------------------------------------------------------
Bottlehead Crack 1.1 with Speedball Upgrade *120V (US)
-----------------------------------------------------------------------------
Includes Bottlehead Badge, Stock Vacuum Tubes, and Power Cord

A great amount of detail was put into this Bottlehead Crack headphone amplifier. The chassis, transformer, and screws were painted with metallic paint. The wooden base was sanded and stained. It was then finished by hand with special oil with increasing grits of sandpaper between coats to get an ultra smooth finish.

The wiring for this amp was carefully angled to provide a pleasing appearance and to ensure that all wires were connected to their proper terminals. Each terminal was carefully inspected to ensure that all joints were properly soldered. The resistances and voltages were then tested and passed all tests. Finally, I've listened to the amp with my own set up to ensure it was in proper working order.

The Bottlehead Crack is an exceptional headphone amp that pairs well with high impedance headphones such as the Sennheiser HD 650's and the HD 800's. The music really shines with live or acoustic music.

If you have any questions or concerns, please do not hesitate to contact me.

*The amp has a universal transformer. Let me know if you need a voltage other than 120V (US) and I can modify this for you during the building process.
------------------------------
Shipping and Returns
------------------------------
Shipping will include tracking. The amp will be carefully packed with plenty of cushion and foam.

Buyers will have 30 days to return the amp.

Bottlehead Crack 1.1 OTL Headphone Amplifier with Speedball Upgrade Quality Build - Service Price Only by TheHeadAmpBuilder

Fri, 06 Nov 2020 20:41:02 -0500

400.00 USD

Bottlehead Crack 1.1 OTL Headphone Amplifier with Speedball Upgrade Quality Build - Service Price Only by TheHeadAmpBuilder

Fri, 06 Nov 2020 20:41:01 -0500

400.00 USD