Limestone PP1 – a power amplifier from Croatia
18.11.2022 08:00 | ~1 minute read
The Croatian company Limestone has introduced the Limestone PP1 mono power amplifier, which uses KT88 tubes. The model is housed in an “armor-piercing” case made of 1.5 mm stainless steel. Kerrock decorative panels add exquisite touches and allow the devices to fit into any interior.
The output stage of the Limestone PP1 amplifier is built using a push-pull circuit with KT88 tubes. The phase splitter and driver stage use Shuguang Black Treasure CV181-Z tubes, which can be replaced with 6SN7 TAD or NOS Sylvania “Bad Boy”. Gold-plated WBT connectors are provided for connecting acoustic systems. This hand-assembled tube amplifier provides impressive audio performance, combining precision engineering with premium components.
Specifications
This product is in the Hi-Fi and High End Electronics and Acoustics database
Power amplifiers mono — Limestone PP1
Model name
PP1
Input sensitivity (mV)
N/A
Input impedance (balanced) (Ω)
N/A
Input impedance (single-ended) (Ω)
N/A
Output impedance (balanced) (Ω)
N/A
Output impedance (single-ended) (Ω)
N/A
Max current (A)
N/A
Output power (8Ω) (W)
N/A
Output power (4Ω) (W)
45
Gain (dBu)
N/A
Frequency response low +/- 3dB (Hz)
30
Frequency response high +/- 3dB (Hz)
30000
Signal to Noise Ratio (dB)
N/A
Total Harmonic Distortion + Noise (0% global feedback) (%)
N/A
Total Harmonic Distortion + Noise (100% global feedback) (%)
1
Max power consumption (W)
N/A
Damping factor
N/A
Dimensions (mm)
250 x 250) x 550
Weight (kg)
18
Official link
Image source - https://limestone.hr
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