Comparison Pro-Ject Record Box E vs Pro-Ject Phono Box USB

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	Pro-Ject Record Box E	Pro-Ject Phono Box USB
	from $149.00 Outdated Product	from $180.00 up to $187.20 Outdated Product
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Features	MM / MC pickups	MM / MC pickups
Dimensions	120x115x32 mm	103x115x36 mm
Weight	250 g	570 g
Specs
Frequency range	20 – 20000 Hz /± 0.5 дБ/	20 – 20000 Hz /± 0.5 дБ/
Dynamic range		93 dB
ADC bit depth	16 bit	16 bit
ADC sampling rate	48 kHz	48 kHz
Output level	0.3 V	0.3 V
MM module
Signal to noise ratio (MM)	94 dB	94 dB
Harmonic distortion (MM)	0.01 %	0.01 %
Gain (MM)	40 dB	40 dB
Input load capacity (MM)	120 pF	120 pF
Input impedance (MM)	47 kOhm	47 kOhm
MC module
Signal to noise ratio (MS)	75 dB	75 dB
Harmonic distortion (MC)	0.05 %	0.05 %
Gain (MC)	60 dB	60 dB
Input load capacitance (MC)	120 nF	0.12 nF
Input impedance (MC)	100 Ohm	100 Ohm
Features
External power supply
Connectors
Inputs	Phono RCA	Phono RCA
Outputs	RCA USB (type B)	RCA USB (type B)
Color
Added to E-Catalog	april 2017	april 2017

Dynamic range

The dynamic range of a phono stage is the difference between the maximum signal level it can produce and the maximum level of self-noise (which inevitably occurs in any electronic audio device). In a sense, this parameter is similar to the signal-to-noise ratio (see below), but in this case we are talking about the difference between the maximum signal and noise levels, and not between the average ones.

The greater the dynamic range, the more advanced the phono stage is considered (ceteris paribus). In top models, this figure can exceed 90 dB and even 100 dB. We only note that in universal devices (see "Intended use") the ranges for MM and MC may differ — the first is usually higher, and it is given in the characteristics.

Input load capacitance (MC)

The input capacitance of the phono stage when working with an MC type pickup (see "Intended use").

This parameter determines compatibility with a specific pickup. The selection rule in this case is as follows: the total capacitance of the phono stage and connecting wires must correspond to the capacitance of the “head”, in extreme cases, at least not exceed it (otherwise the sound will deteriorate noticeably). In order to simplify this matching, it may be possible to adjust the input capacitance (see "Adjustments").