A finished Soundaries tube amplifier glowing in its wooden frame

Custom tube audio · Chonburi, Thailand

Triode amplifiers, built one at a time for one listener.

Soundaries designs and hand-builds tube amplifiers, LCR phono preamps and transformers to order. Every piece starts with your speakers, your room and the music you play, and finishes with Thai or Japanese transformers in a frame of Thai hardwood.

Start a commission See the collection

Since 2017Two makers, one workshop

Clients in 6 countriesUSA · Canada · Italy · Australia · Israel · Lithuania

ISO TransformersAuthorized distributor in Thailand

What we make

Four lines, all made to order

Choose a starting point. We change tubes, transformers, inputs, wood and finish to suit you.

8 designs

Power amplifiers

Single-ended triodes, push-pull and bi-amp designs, from the Essential series to flagship monoblocks.

Thai-wound transformers From $600Japanese transformers From $1,000

7 designs

Preamps & phono

LCR phono stages and line preamps, from the Essential series to two-chassis designs with a separate power supply.

Thai-wound transformers From $800Japanese transformers From $1,000

3 designs

Transformers & accessories

Step-up transformers, switching boxes and cases that solve one problem in your system.

5 designs

Speakers, systems & restoration

Crossovers, field-coil supplies, full listening systems and repairs to classic gear.

Most requested

Where most clients begin

Power amplifiers start at $600 with transformers wound in Thailand, or $1,000 with Japanese transformers. Preamps start at $800, or $1,000 with Japanese transformers.

Essential

Essential 300B Single-Ended

The 300B sound at an accessible price, with transformers wound in Thailand.

$900 – $1,500Details →

Signature

LCR Phono + Line Preamplifier

A full tube preamplifier with an LCR phono stage and a separate power supply.

$1,000 – $1,500Details →

Flagship

300B Two-Stage Monoblocks

Four chassis, two per channel. A 45 drives the 300B through an interstage transformer.

$3,000 – $5,000 per pairDetails →

All 23 designs Price guide

ISO output transformers, power transformers and chokes

Authorized distributor · Thailand

ISO Transformers, made in Tokyo

The transformers inside our own amplifiers, available to builders across Thailand. 60 models of output, interstage, line and power transformers and chokes, with final prices in Baht. Power transformers are wound for 220–240 V at no extra charge.

Browse 60 ISO models

How a commission works

Eight stages, and you see each one

From the first schematic to the final listening test, you get photos and notes at every stage. A typical amplifier takes 3–5 months.

See the process Our story

A Soundaries listening room set up for a showroom

01
Your room
We start with your speakers, your room and the music you play, then draw the circuit around them.
02
Chassis and wood
Panels are cut, drilled and engraved here, and the frame is made from Thai hardwood.
03
Hand-wiring
Every joint is wired and soldered by hand, point to point. You get photos as it comes together.
04
Burn-in and listening
Each build runs for days on the bench and is measured and listened to before it ships.