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CATALOG

Description

The IEL300B is a handcrafted tube integrated amplifier made in Italy by TP Audio, designed for those seeking an authentic listening experience free from electronic compromises. It is a SET (Single Ended Triode) integrated amplifier operating in Class A without feedback , a circuit configuration that favors harmonic linearity and natural timbre over raw power: the result is a warm, detailed sound reproduction that is particularly appreciated on acoustic instruments and vocals.

The heart of the amplifier is entrusted to two 300B power tubes , which can also be switched to the 2A3 type via a rear selector, so that the sonic character of the device can be modulated according to the listener's taste. The power supply section uses 5U4/5R4 rectifiers, while the bias is externally adjustable with dedicated control instruments, a detail that simplifies maintenance and balancing of the tubes over time.

From a construction standpoint, the assembly is entirely point-to-point , both in the power supply and audio sections: a manufacturing technique that reduces parasitic interference and enhances the quality of the components. The aluminum chassis with solid mahogany or beech sides lends a vintage, handcrafted aesthetic, consistent with the brand's "no-frills" construction philosophy. The 21-section output transformers contribute to a claimed frequency extension of 25 Hz to 30.000 Hz.

With a power of 8,5 W RMS per channel, the IEL300B must be paired with high sensitivity hi-fi speakers , a typical condition for any single-ended valve amplifier : a frequent question among enthusiasts is precisely which speakers to choose for a low-watt valve amplifier, and the answer must be sought in speakers with high sensitivity (typically from 90 dB/W/m and above), where a few watts in Class A deliver surprising dynamics.

Specifications

Amplification type valve
Valves used 2 x 300B (switchable with 2A3), 5U4 / 5R4
RMS power per channel 8.5 W
Reference load 4 / 8
Line input sensitivity 250
Input impedance 100 kOhm
Frequency response 25 Hz – 30.000 Hz (±1,5 dB)
Rapporto S/N -90 dB
Alimentazione 220 / V 230
Cabinet material Aluminum, solid mahogany or beech wood sides

FAQ

AMPLIFIERS

TP Audio
IEL300b

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