Rockhopper Audio Build Feed

FS: 3-Channel Beta 22 Headphone Amplifier

Stephen — Sat, 01 Oct 2011 17:18:31 +0000

Please note our new shipping policies.

For sale is a Beta-22 amplifier. Here are the specs:

The Amplifier (Beta 22):

3-channel active ground configuration

Gain setting default will be 5, but can be configured for 2, 8, or 11 at the request of the customer.

Vishay/Dale resistors used throughout

Alps Blue Velvet volume control

Silver coated copper stranded hook up wire used throughou

High quality custom designed black anodized cases with enough room to upgrade the amp to a 4-channel balanced amp in the future.

Engraved panels

1 set of RCA inputs and a set of RCA loop outs

Sexy black volume knob

Our signature Orange LED!

The Power Supply (Sigma 22):

100V-240V operation

Vishay/Dale resistors used throughout

High quality DC umbilical cord using Amphenol connectors pre-configured for potential upgrade to a balanced 2 X Sigma 22 setup.

High quality custom designed black anodized cases with enough room to upgrade the power supply to a 2 X Sigma 22 power supply for use with a balanced Beta22.

Engraved panels.

Again with the Orange LED!

Price: $1350 plus insurance/shipping (US: Free Shipping; Int'l: $150 Flat Rate)

Sold: M3 amp for sale

Stephen — Mon, 10 May 2010 23:50:51 +0000

I have an M3 amp for sale right now. Here are the specs:

3 X OPA627 opamps. These are my favorite opamps and frankly, you can't do much better than this in the M3.
Gain set to 5: Perfect for a wide variety of headphones
ALPS Blue Velvet volume control
Cardas RCA jacks
Elna Silmic II Electrolytic capacitors
Vishay/Dale resistors
Silver coated copper stranded wire
1 year warranty, parts and labor
Black aluminum chassis
Our signature orange LED
Elpac Wall-wart power supply ($25 value)
US/CAN sale ONLY! Sorry.
Price: $450 plus $15 shipping/handling
Available RIGHT NOW!

Sold: For Sale: 2 M3 amplifiers

Stephen — Fri, 02 Apr 2010 16:00:23 +0000

I have two M3 amps for sale right now. Both have identical specs... Here they are:

3 X OPA627 opamps. These are my favorite opamps and frankly, you can't do much better than this in the M3.
Gain set to 5: Perfect for a wide variety of headphones
ALPS Blue Velvet volume control
Cardas RCA jacks
Elna Silmic II Electrolytic capacitors
Vishay/Dale resistors
Silver coated copper stranded wire
1 year warranty, parts and labor
Black aluminum chassis
Our signature orange LED
Elpac Wall-wart power supply ($25 value)
US/CAN sale ONLY! Sorry.
Price: $500 plus $15 shipping/handling
Available RIGHT NOW!

SOLD: 3-Channel Beta 22/Sigma 22

Stephen — Sat, 27 Feb 2010 22:00:09 +0000

Please note our new shipping policies.

For sale is the first of a run of 3-channel Beta-22 amplifiers. Here are the specs:

The Amplifier (Beta 22):

3-channel active ground configuration

Gain setting default will be 5, but can be configured for 2, 8, or 11 at the request of the customer.

Vishay/Dale resistors used throughout

Alps Blue Velvet volume control

Silver coated copper stranded hook up wire used throughou

High quality custom designed black anodized cases with enough room to upgrade the amp to a 4-channel balanced amp in the future.

Engraved panels

1 set of RCA inputs and a set of RCA loop outs

Sexy black volume knob

Our signature Orange LED!

The Power Supply (Sigma 22):

100V-240V operation

Vishay/Dale resistors used throughout

High quality DC umbilical cord using Amphenol connectors pre-configured for potential upgrade to a balanced 2 X Sigma 22 setup.

High quality custom designed black anodized cases with enough room to upgrade the power supply to a 2 X Sigma 22 power supply for use with a balanced Beta22.

Engraved panels.

Again with the Orange LED!

Price: $1800 plus insurance/shipping (US: $75 Flat rate; Int'l: $150 Flat Rate)

SOLD: Balanced Beta 22 with the Works!

Stephen — Sun, 20 Dec 2009 03:31:13 +0000

For sale is a decked out Balanced Beta 22 amplifier. This amp is decked out with all sorts of inputs and outputs, as well as a Joshua Tree Stepped Attenuator.

SOLD: Balanced M3 for sale!

Stephen — Mon, 16 Nov 2009 04:00:36 +0000

For sale is a brand new Balanced M3 dynamic headphone amp. It's built, tested and ready to go. This amp has one set of balanced inputs and two sets of singled-ended inputs. This allows you to run it as one balanced amp or as two single-ended amps. The single-ended version are full three channel active ground topology. It's the best of both worlds.