Tag Archives: reel to reel

More reel to reel decks: United Home Audio !

I’ve recently talked about the ATR10 in this page. This time it’s turn of United Home Audio HQ series.

UHA reel to reels

UHA-HQ decks

UHA-HQ decks are based on recent TASCAM reel to reel units, with modified electronics, heads, power transformers and parts, depending on model. They are compatibile with prerecorded tapes included in the Tape Project catalog, discussed here.

We’re talking about machines intended to perform at their best for esoteric hifi listening. However it’s interesting to note that they can record as well, unlike the more common REPRO units often used as hi-end playback devices.

Here is a summary of UHA-HQ models (and for each one, a note describing the main improvement over the previous one).

  •  Phase 5 – new playback preamp
  •  Phase 6 – new UHA-HQ playback head
  •  Phase 7 – new UHA-HQ recording head
  •  Phase 8 – audiophile toroidal power supply – new playback and recording preamps
  •  Phase 9 – new esoterics caps on play and rec boards, nearly DC-coupled signal path

(complete details about differences are available at UHA site).

Features (some depend on model):

  •  Tape: 1/4”
  •  Reels: up to 10 1/2”
  •  Heads: half-track, capable of record and playback
  •  Speeds: 7 1/2 and 15 IPS – 19 cm/s and 38 cm/s
  •  EQ: NAB and IEC
  •  Servo-controlled tape tension
  •  Sealed bearings on the idlers
  •  XLR and/or RCA inputs and outputs – selectable RCA output of +6db or +12db

Visit the UHA-HQ series page at UHA site.


Sonorus Audio ATR10 Vacuum Tube Reel to Reel

Sonorus Audio produces the ATR 10, a reel to reel deck based on the chassis from the Revox PR99 . The ATR10 is a 1/4” REPRO machine (playback only, no recording) for hi-end music listening.


Sonorus Audio ATR10 Vacuum Tube Reel to Reel

Electronically regulated tape tension,  dual EQ (NAB and IEC), wire remote controlling and Library Wind (FF controlled speed to prepare tape for storage) are all new functionalities.

Sonorus builds the tape transport with original mechanical components from Revox/Studer. Internal electronics have been redesigned to use parts currently in production. The playback board is completely new, featuring a vacuum tube preamp section.

Frequency response:

  • 15ips: 18Hz – 23kHz (+2/-3dB)
  • 7.5ips: 14Hz – 20kHz (+2/-3dB)

Signal-to-noise ratios: RMS, ASA-A weighted,  +6dBVU (510nWb/m)

  • NAB (7.5ips): 73dB
  • NAB (15ips): 71dB
  • IEC (7.5ips): 71dB
  • IEC (15ips): 73dB

Distortion: THD measured at 1kHz

  • 15ips, 0dBVU: <0.15%
  • 15ips, +6dBVU: <0.5%
  • 15ips, +13dBVU: <3%

Tape tension: Electronically regulated. Tested with 10.5” (26.5cm) reels.

  • Supply reel side: 0.45N +/-0.05N
  • Take-up reel side: 0.60N +/-0.05N

Visit Sonorus Audio site here, or direct-download the brochure and the user manual.