Emotiva BasX TA1 Integrated Amplifier Lab Report

Lab Report

While Emotiva has changed the TA1's power rating to 60W/8ohm over the older TA-100's 50W/8ohm, it is careful not to suggest the Class A/B power amp or PSU is any bigger! In practice, those 'tweaked' analogue specifications for the TA1 look to have been brought into line with those we published for the TA-100 [HFN Apr '19]. Specifically, the TA-100 achieved 2x63W/8ohm and 2x95W/4ohm and the TA1 matches this at 2x63W/8ohm and 2x93W/4ohm. Under dynamic conditions the TA-100 stretched out to 87W, 153W, 234W and 116W into 8, 4, 2 and 1ohm loads, respectively, while the TA1 achieves 85W, 151W, 234W and 52W under identical conditions [see Graph 1], the latter figure now cut short by electronic protection. So there have been some changes... Gain is unaltered at +41.6dB but the TA1 is a little less noisy and the A-wtd S/N wider at 90.5dB vs. 88.9dB (re. 0dBW). Distortion is the same – the TA1 still showing higher THD on the left than right channel, the latter holding to within 0.01% from 1W-50W/1kHz and 0.0025-0.03%/1W from 20Hz-20kHz. The –3dB response limits remain at 3Hz-75kHz.

Tested via its preamp output, the AD1955-based digital stage achieves a maximum 3.98V output (at 0dBFs) supported by a wide 111.1dB A-wtd S/N ratio and an impressively low <1ohm output impedance (again, increasing to 17ohm/20Hz). Distortion reaches a maximum of 0.005-0.095% (20Hz-20kHz) at 0dBFs and a minimum of 0.0003-0.003% over the top 30dB of its range [Graph 2, below]. The standard linear phase digital filter offers a 77dB stopband rejection and response limits of –0.2dB/20kHz (CD/48kHz data), –2.0dB/45kHz and –5.9dB/90kHz (96kHz and 192kHz data). Jitter remains <200psec for all sample rates. PM


Dynamic power versus distortion into 8ohm (black trace), 4ohm (red), 2ohm (green) and 1ohm (cyan) speaker loads. Maximum current is 10.8A


Distortion vs. digital signal level over a 120dB dynamic range (preamp out), 1kHz (black); 20kHz (blue)

Continuous power (<1% THD, 8/4ohm) 63W / 93W
Dynamic power (<1% THD, 8/4/2/1ohm) 85W / 151W / 234W / 52W
Output impedance (20Hz–20kHz) 0.033-0.037ohm (0.8-17ohm, pre)
Freq. resp. (20Hz–20kHz/100kHz) –0.1 to –0.25dB/–4.8dB
Digital jitter (S/PDIF at 48kHz/96kHz) 135psec / 190psec
A-wtd S/N ratio (re. 0dBW/0dBFs) 90.5dB (Analogue) / 111.1dB (Dig)
Distortion (20Hz-20kHz; 0dBW/0dBFs) 0.0025-0.03% / 0.005-0.095%
Power consumption (idle/rated o/p) 11W / 195W (2W standby)
Dimensions (WHD) / Weight 432x67x330mm / 6.8kg
Price £669

Emotiva Audio Corporation
Tennessee, USA
Supplied by: Karma AV, York
01423 358846