The Limestone PP1 mono tube power amplifier, produced by the Croatian brand Limestone, merges traditional circuit design with contemporary aesthetics. Its chassis, crafted from 1.5 mm stainless steel, ensures durability while offering a sleek finish that embodies the classic charm of vintage audio equipment. Furthermore, the inclusion of decorative Kerrock overlays enhances its overall sophistication.
Limestone PP1 – monoblock on KT88 lamps
The output stage of the Limestone PP1 amplifier employs a push-pull configuration utilizing KT88 tubes. For the phase splitter and driver stage, Shuguang Black Treasure CV181-Z tubes are used, which can be substituted with 6SN7 TAD or NOS Sylvania “Bad Boy” tubes upon request. It features high-quality gold-plated WBT connectors for speaker system connections. This meticulously hand-assembled tube amplifier offers outstanding audio performance, merging expert engineering with top-tier components.
Specifications:
- Output power: 45 watts per channel
- Frequency response: 30 Hz – 30 kHz (-3 dB)
- Total Harmonic Distortion: Less than 1% at 1 kHz
- Signal to noise ratio: 85 dB (noise about 1 mV)
- Input sensitivity: 0.7V RMS for full 45W output power
- Load resistance: 4 Ohm and 8 Ohm
- Dimensions (W x H x D): 25 x 25 x 55 cm
- Weight : 18 kg