80-transistor matrix
40 dual transistors deliver higher current and better control of low-impedance headphones.
IBASSOAMPLIFIER CARDCustomer reviews (0)
iBasso AMP18 Amplifier Card for DX340
An 80-transistor upgrade for your DAP.
A high-power balanced amp card for iBasso DX300, DX320 and DX340, with up to ~1740mW per channel at 32Ω on 12V DC.
Regular price
£249.99
Unit price
Including VAT
Free next day UK delivery
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iBasso AMP18 Amplifier Card for DX340
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MEET THE AMP18
An 80-transistor upgrade for your DAP.
A high-power balanced amp card for iBasso DX300, DX320 and DX340, with up to ~1740mW per channel at 32Ω on 12V DC.
Fast, clean transients
A cascaded current-feedback design avoids transient distortion while preserving dynamics.
Dual 4.4mm outputs
Balanced phone and line outputs for DX300, DX320 and DX340 players.
Read the full description
The iBasso AMP18 is a swappable amplifier card for the iBasso DX340, DX320 and DX300 players. An 80-transistor matrix, a cascaded current-feedback circuit and a two-stage design give up to 1,740mW per channel into 32Ω when a DX340 runs from 12V DC, through dual 4.4mm balanced outputs: one for headphones and a dedicated line out.
80 transistors on a card
The AMP18 breaks through the size limits of an amp card: 40 dual transistors form an 80-transistor matrix, which iBasso calls a feat of real difficulty. Good circuit design and so many high-quality transistors give it higher current output, better compatibility with low-impedance headphones and outstanding sound.
Cascaded current feedback
Traditional headphone amplifiers often use deep, large-loop negative feedback. That lowers static distortion but delays the signal, so sudden dynamics such as drums or intense passages lose speed, punch and detail. The AMP18 uses a cascaded current-feedback circuit instead, avoiding that transient distortion while keeping its dynamic range and fast transient response.
Two-stage amplification
The first stage combines low-noise op-amps with transistors: the op-amps restore the detail in the source, while the transistors boost drive so the signal isn’t weakened early on. The second stage uses current-mirror amplification with complementary outputs for linear current output. Beats start and stop crisply with natural decay, and details such as violin harmonics or a singer’s breath come through clearly.
The complementary output stage amplifies the positive and negative halves of the waveform symmetrically, greatly reducing the asymmetric distortion of conventional transistor output stages. Without clipping, deep bass and treble extension stay clean, the dry “digital” sound is reduced and the result is warmer and more natural.
1,740mW per channel on 12V DC
With the DX340’s external 12V DC supply the AMP18 swings ±12V and, in super-gain mode, delivers 1,740mW + 1,740mW into 32Ω, enough for almost any headphones or IEMs, with deep, impactful bass, a full midrange and clean, extended treble. On battery it gives 1,170mW + 1,170mW.
Dual 4.4mm balanced outputs
One 4.4mm socket is the headphone output, for better drive and sound with flagship headphones and IEMs; the other is a dedicated balanced line output, a clean source for an external headphone amplifier, so a DX340 with the AMP18 can be the heart of a full hi-fi system. The card also fits the DX300 and DX320, transforming their sound too.
| 4.4mm phone out | 1,740mW + 1,740mW @ 32Ω (12V DC) · 1,170mW + 1,170mW (battery) · THD+N −114dB (no load), −105dB (300Ω), −93dB (32Ω) · dynamic range 123dB · SNR 122dB · crosstalk 122dB · 10Hz–40kHz ±0.9dB · output impedance 1.2Ω |
|---|---|
| 4.4mm line out | THD+N −110dB (no load) · dynamic range 123dB · SNR 123dB · crosstalk 114dB |
| Design | 40 dual transistors (80-transistor matrix) · cascaded current feedback · two-stage, complementary output |
| Players | iBasso DX340 (12V DC on DX340 only), DX320, DX300 |
Good to know
- The 12V DC power mode needs a DX340 (power supply sold separately). The DX300 and DX320 run the AMP18 on battery only.
- Update your DX340 to firmware 1.07 or later before fitting the AMP18.
- In the box: AMP18 card, screwdriver, spare screws and warranty card.
In the box
- iBasso AMP18 amplifier card
- Screwdriver
- Spare screws
- Warranty card
THE FINER DETAILS
Built for
better listening.
Know what you’re choosing.
Find the right fit for your setup.
- Design
- Replaceable amp card, 80-transistor current-feedback design
- Headphone outputs
- 4.4mm balanced
- Output power
- 1,740mW + 1,740mW @ 32Ω (DX340 on 12V DC) · 1,170mW + 1,170mW @ 32Ω (battery)
- Frequency response
- 10Hz–40kHz (±0.9dB)
- Compatibility
- iBasso DX300, DX320 and DX340
- Signal-to-noise ratio
- 122dB (phone out) · 123dB (line out)
- Distortion (THD+N)
- −114dB (no load) · −93dB (32Ω)
- Output impedance
- 1.2Ω
- Crosstalk
- 122dB
- Line outputs
- 4.4mm balanced
Specifications are based on manufacturer information and may change.
The press, on the AMP18
Independent ears.
Their verdict.
A different perspective on your next listen.
01 / Expert review
a refined, analog, and slightly warm sound signature, with excellent depth
Marcus
Read reviewSelected excerpts from published reviews. Scores are each publication’s own. Follow the links for their full verdicts.
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How does free delivery work?
Every UK order has a free delivery option, and orders of £50 or more qualify for free next day delivery. Order by 12 noon, Monday to Friday, for next day delivery; orders placed after 12 noon, at the weekend or on a bank holiday are dispatched on the next working day. Stock availability and destination also affect arrival — check the options shown at checkout.
Pre-orders ship when stock arrives; the next day service starts after dispatch. Full delivery information
What if it’s not right for me?
Return within 14 days for any reason, or within 30 days if faulty, with free return postage. See our full Returns Policy for conditions and how to start a return.
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