Phil Jones Bass X4C Nanobass 35W Black Small Bass Combo

Backpack-Sized Bass Amp with Studio-Quality Tone

The Phil Jones Bass X4C Nanobass 35W Black is the most compact combo amplifier the brand has ever built, designed for desktop practice, travel, and busking without sacrificing the warm, full-range tone Phil Jones Bass is known for. At roughly 6.3 x 7.9 x 7.8 inches and just over 5 lbs, this mini combo slips into a backpack or carry-on and still pushes 35 watts through a single proprietary 4-inch driver. The X4C Nanobass is the right choice for bassists, acoustic guitarists, and multi-instrument players who need a portable amp that travels anywhere and sounds far bigger than its size.

What Makes the X4C Nanobass Stand Out

Inside the cabinet sits a PJB N52 Neo-Power 4-inch speaker paired with a 35 W digital amp that uses DSP-based active crossover and dynamic range control, a combination that lets a tiny driver reproduce bass frequencies with surprising authority. The amp also accepts a USB-C power bank with USB PD power delivery, so players can run it from a 20 V laptop power bank for true cable-free sessions anywhere AC power is unavailable.

Power, Speaker, and Connectivity

The 35 W output and full-range Neo-Power 4-inch driver give the X4C Nanobass enough headroom for rehearsal rooms and small coffeehouse gigs, while the worldwide 100-240 V AC input means it works in any country without adapters.

• Power Output: 35 W — ample volume for band rehearsals and small venue sets
• Speaker: 1 x N52 Neo-Power 4-inch driver — full-frequency response from a single compact cone
• Inputs: 1/4" instrument jack, 3.5 mm aux, Bluetooth 5.0 (aptX HD) — pair a phone for backing tracks or stream music wirelessly
• Output: 3.5 mm headphone jack — silent practice at any hour

Tone Shaping and EQ

A 3-band EQ with ±15 dB per band gives players generous tone-shaping range, useful when switching between bass, electric guitar, ukulele, or electronic drums through the same amp.

• EQ: Bass shelf 100 Hz, Mid 1 kHz (bandwidth 120 Hz-10 kHz), Treble shelf 10 kHz, ±15 dB each — wide enough to compensate for different pickup systems
• Frequency Response: 72 Hz - 15 kHz — covers the full range of bass and most acoustic instruments

Portability and Power Options

The X4C Nanobass is built for life on the move, with a rugged MDF cabinet covered in Tolex, top-mounted full-sized controls, and a built-in worldwide AC supply.

• Weight: 5.3 lbs / 2.4 kg — light enough for daily carry
• Dimensions: 6.3 x 7.9 x 7.8 inches / 160 x 200 x 198 mm — fits a backpack or carry-on
• Power: AC 100-240 V / 50-60 Hz plus USB-C PD input for power banks — play anywhere, with or without mains power

Who the X4C Nanobass Is For

The X4C Nanobass is the right choice for traveling bassists, apartment players, and multi-instrumentalists who want a single amp that handles bass, electric guitar, ukulele, violin, and electronic drums with equal confidence. It suits students needing a quiet practice solution with a headphone output, gigging musicians who want a grab-and-go backup amp, and buskers who need Bluetooth playback and USB-C power bank support for street performances. Acoustic guitarists will also appreciate the warm low end and clean headroom that reviewers have praised for nylon-string and 12-string playing.

Phil Jones Bass: A Compact Amp with a Big Reputation

Phil Jones Bass has built its name on small cabinets that deliver disproportionately large bass tone, and the X4C Nanobass continues that tradition as the brand's most portable combo to date. The proprietary N52 Neo-Power driver and DSP-based amplifier design reflect decades of the company's research into full-range sound from compact enclosures, earning the X4C Nanobass coverage in Bass Magazine, Guitar Player, and Acoustic Guitar.