ADL GT40a Phono/Headphone Amp w/ DAC
MM/MC Technical Data:*
*The load (Input Impedance) for the ADL GT40α is fixed at 47K ohm for MM and 100 ohm for MC. Also, it has no setting for gain to match different impedance headphones. We recommend using 16 ohm to 300 ohm impedance headphones.
Ratings & Reviews
The ADL-GT40a is a phenomenal piece of equipment. It is a must have if you are interested a versatile tool to enhance vinyl listening or music production. The Inputs and Outputs allows it to interface with any piece of home or professional audio equipment. I have mine driving my Yamaha MSP5’s for truly flat high fidelity listening. It couples to my Sound Devices mixer for doing pro music production. The RIAA curve is excellent for vinyl listening/conversion to 24Bit 192Khz on my MacBook Pro. My TT is a Yamaha YP-B2 with Ortofon 2mRED. It even makes my MDS-E10 (MD Deck) and CDR-W33 (CD Mastering Deck) sound better converting the 24Bit 44.1Khz when routed by Toslink through my Mac. I can easily switch from driving my monitors to headphones by plugging in my Grado’s.
DAC: Digital to audio, ADC: analogue to digital, phono & headphone pre-amp
I have owned a GT40A for 3 years and use it almost daily. No breakdowns or performance problems. If you play and record analogue (ie; turntable) you can use by pushing a button and back to a DAC by pushing a button again. It is incredibly versatile: interfacing analogue to digital in both directions (DAC & ADC), phono pre-amp for all cartridges (low input MC to MM cartridges), 0, 6, 12 gain increase adjustments, headphone amp, easy turn knob attenuation adjustment that also controls headphone volume, 24 bit/192 Khz capable ...it does everything. It has only one analogue and one digital input which may be a problem for some. Windows software will sometimes get confused if you change your USB port to another or remove midstream - you just need to be aware. Minor issues. Great product and respectable performance.