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Unlike conventional phono stages, the Tube Box S2 harks back to a classic era of analogue sound, using a pair of valves to amplify your turntable’s signal. That different approach gives your sound a remarkably different feel, with outstanding warmth and a lush, laid-back sound that other phono stages just can’t touch.
With a host of settings, the Tube Box S2 works with both Moving Coil and Moving Magnet cartridges to make you fall in love with your records all over again. And all in a compact form-factor that’s small enough to fit in the palm of your hand! Good things truly do come in small packages.
- Suitable for MM and MC cartridges
- Precise RIAA equalisation in two parts, passive/active
- Fully discreet circuit design without OpAmps
- 2x ECC83 tubes (replaceable)
- Front-sided Subsonic filter button
- Front-sided Gain control
- Gold-plated RCA inputs and outputs
- External power adaptor and multiple internal power supplies
Tubes: 2 x ECC83 (12AX 7A)
Input impedance: 10 ohms, 100 ohms, 1 kohm, 2 kohms
Input capacitance/impedance: 47pF, 147pF, 267pF, 367 pF, 487 pF and 587 pF* / 47 kohms
Input gain: 40 dB, 43 dB / 50 dB, 60 dB and 63 dB
Noise floor: 80 dB (A weighted) at 40 dB input gain, 75dB (A weighted) at 50 dB and 63 dB input gain
THD: <0.02% at 40 dB input gain <0.05% at 50 dB and 63 dB input gain
RIAA-equalisation curve accuracy: +/- 0.4 dB/20 Hz - 20 kHz
Subsonic filter: at 20 Hz with 18 dB/octave
Input: 1 pair RCA/phono sockets
Line-level output: 1 pair RCA/phono sockets
Outboard power supply: 18 V / 1.000 mA DC
Power consumption: 470 mA DC, <1W in standby
Dimensions: W x H x D with sockets 103 x 73 x 131 mm
Weight: 410 g without power supply
In the box
Tube Box S2 phono preamplifier
More from Instant Classic
Why buy from Instant Classic?
Instant Classic is an online record and music system store from Melbourne, Australia.
We offer great upfront deals as well as Australia's first hifi subscription service. Our returns are no-fuss and we're all about treating our customers how we'd like to be treated.
We're available by email, phone, livechat, WhatsApp - whatever your flavour is. We're online during business hours of course, but we aim to get back to you pretty fast at any waking hour. Usually you'll hear back from us very quickly.
If you don't like your purchase for whatever reason within the first 50 days, we'll take it back! None of this 'product must be in brand new condition' nonsense - we want you to be happy. Just make sure it isn't damaged.
Is analogue better?
Vinyl is a cost-effective way to get into proper audio. Some experts argue it it gives a better experience than digital, with a lack of compression and a naturalness that’s hard to replicate.
Digital relies on a computerised interpretation of sound-waves. Turntables and records, however, maintain analogue integrity by translating these sound-waves into physical grooves and vibrations rather than 0s and 1s.
I liken turntables to coffee. They can be terrible or wonderful.
Rightly done, they'll produce a brilliant sound and last you a long time. But the bad ones sound gross and can damage your records.
It's all about materials and construction. A turntable is a mechanical instrument that needs to measure record grooves in a delicate way.
What to *avoid* in a turntable
This product page will run through what makes the Primary E such an ace deck for the money. But what shouldn't be inside a turntable is just as important as what is. Here's a summary of the things to avoid, and we've got more detail here.
Inbuilt speakers. This is baaaaad. They're small and tinny, so you'll be strangling whatever signal does come out of the record. But also the vibrations being inside the chassis create a feedback loop which goes back into your records.
A tonearm that's too short or made out of the wrong materials - this will interfere with the accuracy of what's embedded in the record. Small platters are bad too - they'll eventually warp your records due to the edge overhang.
Stylus and cartridge that put the wrong pressure on your records or are made out of bad materials. These will distort your sound and potentially damage your vinyl.
Cheaper motors that don't spin precisely in time. You'll hear higher or lower pitch in your music.