Aiyima A70vsOldchen (Laochen) EL34-B
A detailed side-by-side comparison of the Aiyima A70 and Oldchen (Laochen) EL34-B — two popular amplifiers in the Chinese HiFi space.
Specifications
Spec
Aiyima A70
Oldchen (Laochen) EL34-B
Class
D
A
Chipset
TI TPA3255 (with PFFB)
—
Topology
Stereo / Mono Bridgeable
Single Ended Triode (SET)
Power
2 × 300W (4Ω) / 1 × 480W (Mono)
10W x 2
Inputs
RCA, XLR
—
Features
Subwoofer Output (Low-Pass Filtered), GaN Power Supply
—
Tubes
—
EL34 x2, 6N9P x2, 5U4G x1
Wiring
—
Point-to-Point (Hardwired)
Remote Control
✗
✗
Tube Stage
✗
✓
Price (estimated)
Price
~$128
~$170
Difference
~$42.00 cheaper (Aiyima A70)
Things to Know
Aiyima A70
- ⚠Volume taper is extremely aggressive; it gets very loud very early on the dial.
- ⚠The subwoofer output is active but does not high-pass the main speakers.
- ⚠Heat dissipation is passive and the case can become uncomfortable to touch during extended high-output sessions.
Oldchen (Laochen) EL34-B
- ⚠The '5U4G' rectifier is often wired in hybrid mode with silicon diodes, which purists dislike.
- ⚠Transformers run very hot, suggesting they are pushed near their saturation limits.
- ⚠Stock Chinese EL34 tubes can sound harsh compared to budget re-issues like Mullard or JJ.
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