Musca Bella Custom Spirit Class A Tube Linestage

with Bluetooth, Balance Control and Bass, Midrange, Treble Tone Controls


Custom built for a customer who decided to go another (another custom built Spirit). Originally equipped with a phono stage which has been removed. Some additional holes inside the chassis no longer being used. 

This piece utilized a power supply using Black Gate filter capacitors with increased capacitance. Clarity Cap coupling capacitors.

Bypass switch to remove tone control circuits but leaves in balance control.

3 sets single ended inputs plus Bluetooth (4th input). 2 sets single ended outputs.

Circuit: 12AU7 Class "A" zero feedback, Stage Gain: 15.5dB, Input Impedance: 100k ohms, Output Impedance: 1k ohms, Phase: Inverts, Frequency: 15Hz->1MHz, Fuse: 1.0A Fast, Voltage: 110V-120V 

Musica Bella LeAnna Twin Chassis with our most advanced power supply, the VTPS - As stated below $2,150 shipped to lower 48

This is anther piece from my personal collection. Never used.
Twin chassis Musica Bella LeAnna Class A tube preamp with our best selling power supply, the VTPS. The VTPS is a choke input design specifically built around the Sophia Electic 274B.

- twin chassis Class A circuit
- transformer coupled balanced outputs
- choke input power supply designed for the ultimate 274B rectifier (picture shown below with Sophia Electric 274B Rigid Plate)
- regulated dc tube filament supply
- V- cap OIMP coupling capacitors
- V-Cap TFTF Teflon bypass capacitors.
- top quality internal components
- high/low gain switch
- Alps Blue Volume Control
- HT bypass if required
With all the updates and upgrades included in this piece, original selling price was $4,500. This is a brand new piece and as you can see in the photos, top plates haven't even been taking out of the wrapping. Full 2 year parts and labor warranty applies.

Optional setup: With remote volume and transformer coupled balanced output: Inquire

Please contact us for more information, details and specs.

You are looking at a custom built Purity Audio Design Basis MKII Class A tube preamplifier. The Basis mkII was a very popular preamp a few years back. This one was custom built in a solid Maple hardwood twin chassis. I have been personall holding on to this unit for nostalgic purposes but its time to thin out some products from my collection. 

The Basis mkII is a Class A design employinh the 6SN7GTB tubes.(This piece will come with a pair of NOS GE 6SN&GTB Coin Base/Clear tops). This Basis mkII performs well aboout its original selling price of $4,200 (without remote volume) This piece provides exceptional detail, resolution, transparency and a sound stage you can walk into with a black as midnight background

Features: Twin chassis solid Maple - High current toroidal transformer - high grade solid state power supply with Panasonic ED capacitors - regulated DC filament supply - Alps Blue volume control - Clarity Cap capacitors - Cardas RCA connectors - HT Bypass - Relay based input selector with LED indicators - 4 Single ended inputs - 2 single ended outputs - one set HT bypass.

Specifications - Gain 17dB - Input impedance 100k ohms - Output impedance 450 ohms - Phase: inverts - Size: 8-3/4" W x 11" D x 6-3/4" H

Retail Price $3,200

Package Price $1,999

Save when purchasing both the Custom & Phono together.

Response Audio is offering this package deal at an exceptionally low cost.

The Musica Bella Phono was designed to perform at its best with the Custom tube linestage. Located on the front panel of the Custom is a high/low gain switch to bring the overall moving magnet phono gain up to 55dB allowing it to run most moving magnet and high output moving coil cartridges with ease. The package will also come with one shielded 3ft pair of the Emberglow II-S interconnect cable

The price shown is for both the Phono stage and single ended Custom preamp.

Purity Audio Design - Reference - Class A balanced tube linestage

Emberglow II-XB - Cstom 33"

This is a custom built pair of our Reference Balanced Interconnect at 33".  Actual pair for sale shown. Reg. $250

$85 includes shipping


What you are looking at is a scalled down, non production version of the Purity Audio Design Harmonia 300B vacuum tube source buffer but with the addition of a 4 input relay based source selector and volume control. By scaled down, this means it is a single ended unit only and built into one of our remaining Musica bella Spitit linestage chassis. This is not a prototype.
We are considering bringing this model to market this summer after having chassis' designed.

The Harmonia BP is designed as a 300B buffer output stage for any source component. Can also be used as a preamp to be used into a power amplifier but may cause noise in higher effeciency speakers. See details below.

DETAILS: Price does NOT include 300B tubes or power cord. Shipping included to lower 48.
2 years parts and labor warranty

​$1,600  includes shipping to lower 48 - SOLD

​​Purity Audio Design - Statement

Twin Chassis, Dual Mono, Balanced Tube Linestage
This is the LAST Purity Statement series linestage to be built. This is your chance to own this highly regarded unit. Several options are available in this custom built for you preamplifier.
Regular price $25,000 -$65,000


Musca Bella - Spirit - Class A Tube Linestage

Award winning Balanced Tube Linestage
This is the LAST Purity Reference series linestage to be built. This is your chance to own this highly regarded unit. Several options are available in this custom built for you preamplifier. 
Regular price $tarting at $14,995 - Contact us for your custom built price


Class A Tube Preamp 
Series - Spirit
Price:  $1,790

Last Spirit preamplifier to be build for a while. This one includes a tube MM phono section with about 55dB total gain.
NOTE:phono tubes will not prpotrude through top cover. Line stage tubes will protrude about 1/4".
Internal photo shows actual unit for sale. Will be complete by 4/12/19.

JULY 2019 - Response Audio will be moving later this year. To gear up for this new venture, we are offering the Musica Bella Segue mk3, Custom Class A preamp and Phono at new low prices. This is your chance to own some outstanding preamplifiers at an exceptional value. 

​​Specials, Previously Owned, Clearance

Please Contact Us if you are interested in any product found on this page.

IMPORTANT NOTICE - October 2018 -Response Audio will be producing a final run of our Spirit Tube Linestages and Segue Tube Buffer and Segue Tube Buffer/Preamp before taking a short hiatus to focus on other designs for Purity and another company. For pieces currently available for shipping, please visit our Custom Builds Page. If you would like a custom Spirit or Segue built for you, please take a look at the web page for the model you are interested in and contact us for pricing.

Seling Price: $790 with 1 year parts and labor warranty.​​

Solid state power supply with high current toroidal transformer.
Power supply is choke filtered, Plate choke on each 300B tubes, Pete Millett regulators for each 300B's filament (one per tube), Each 300B has a high end Raven Audio Teflon capacitor across the filament pins, Clarity Cap acrylic encapsulated coupling capacitors bypass with film capacitor and Raven Audio Teflon capacitor., Alps Blue volume control
Preamp/Buffer switch (bypasses volume control)
4 single ended inputs
2 single ended outputs
Output Impedance: 90 ohms

Please contact us with any questions comments or concerns you may have prior to purchase.h here.

Model JSD JM-608. Midrange 6-1/2 

Made in California

Total of 8 drivers - Brand new in box


$65 for all 8 drivers + shipping

​Credit Cards accepted

Special - Emberglow II

​Latest series of our best selling interconnect. Affordable high end Save BIG.  Prices starting at only $79 pr. up to 36"
​Ships world wide.


Purity Audio Design - Basis MK2


Details: Custom power transformer custom designed for Musica Bella Audio for the LeAnna/Spirit preamplifiers. All JJ Electronic power supply capacitors. Seperate PS output stages for each the phono and line. Each section utilizes a dedicated regulated filament supply which is feed by seperate taps of a high current toroidal transformer.
Line stage uses high quality acrylic encapsulated Clarity Cap CMR cpacitors as can be seen in photo.
Phono stage uses Sonic Craft capacitors for a clean presentation.
Alps Blue volume control
4x RCA inputs
2X RCA outputs
HT Bypass not implimented (yet).
Line - 2x 12AU7 tubes
Phono - 1x 12AX7, 1x 12AU7
2 years parts and labor warranty
Please contac us for additional imformation

Shipping to the lower 48 included.

Musica Bella Package Deal - Custom & Phono