Musica Bella Audio

05/27/2026

For sale: grab this Last First Gen Harmonia JR. DHT Output Stage with gain control. Can use 45/2A3 tubes. New series & chassis coming. Actual unit for sale in picture. Video and additional pictures in comments. Will supply 1 pair 2A3 tubes.
$2695

Details:

We offer several ranges of tube equipment for Audiophiles & Music Lovers. "Build your system for yourself, not the critics"

05/26/2026

For those who like to restore old tube amplifiers. Here is an old RCA RS199B EL84 stereo amplifiers. Sold as is. I have never powered it up.
Asking $150 shipped. Message me if interested.
The Cobalt blue version was my plan of attack. Generated by AI

Audio Performance Specifications
Power Output: 3 to 5 Watts RMS per channel continuous.
Operating Class: Pure Class A (inherent to single-ended operation), meaning the output tubes are biased to conduct current continuously through the entirety of the signal cycle.
Frequency Response: Typically 40\text{ Hz} to 15,000\text{ Hz} (\pm 2\text{ dB}).
While the 6BQ5 tube is capable of wider bandwidth, the frequency response is physically limited by the core size and interleaving of the compact, stock RCA output transformers visible on the right side of the chassis.
Output Impedance: Hardwired output secondary taps designed primarily for 4 ohm or 8 ohm console speaker arrays.

05/22/2026

Anyone know where I can find the aluminum corner post as seen here?

05/19/2026

SOLD. Ming-Da MC-7 Linestage
Heavily modified unit by Response Audio. Dead quiet with tube, solid state and Hybrid amplifiers.
Does not come supplied with tubes.
Signal path capacitors replaced with combination of SoniCap, V-Cap and AudioCap.
Power supply filter capacitors replaced with proper value for rectifier. Then bypasses with film cap.
Input signal wire replaced.
V-Cap OIMP output capacitors with film bypass.
All filter caps replaced/upgraded and bypassed with SoniCap.
9 pieces SoniCap, 2 pieces Theta AudioCap, 2 pieces V-Cap OIMP, 5 pieces power supply capacitors

Video in comments

Asking $650 OBO

05/12/2026

Some new -2021 (and old-1969Western Electric tubes to test in the prototype GaN FET Hybrid amp capable of running 45, 2A3 or 300B tubes.
Being used as a preamp is the Harmonia Jr running NOS 45 tubes.

05/11/2026

Harmonia Jr with 2A3 feeding Master DHT/300B Hybrid GaN FET amp with 300B input tubes. My personal test system.
(Places in setting by AI)

05/10/2026

For sale- Classic Philips 1541 DAC in excellent condition. Asking $400 OBO

05/07/2026

Harmonia Jr running 45 tubes feeding the Master DHT GaN FET Hybrid running 2A3 Black Plate input tubes with 300 watt output stage.

05/05/2026

Another Harmonia Jr DHT Tube Output Stage - Equipped with non-remote gain control- ready to go. Shown in video with 2A3 tubes. $2,695



See the details

https://responseaudiony.com/harmonia-jr