Diatonic harmonicas with 10 holes (most common models). On all of the instruments from this series all missing semi-tones can be played by using special techniques (Bending and Overblow). This requires a different way of playing compared to the classical approach of playing the harmonica (Playing in different playing positions).
Therefore the 10-hole models became a central stylistic element of Blues music, that's why it is commonly named "Blues-Harp" or simply "Harp". In contrast to the Chromatic Harmonica these models are tuned in the so called Richter tuning, which allows full chord accompaniment by using tongue-techniques.
The classical Blues-harmonica players swear by the traditional wooden combed models, which on all SEYDEL models, is totally sealed and does not swell at all. Many players prefer plastic combs - or even plastic combs with recessed reedplates (SESSION) which prevent the lips from getting in touch with the metallic reedplates. The aluminum combs of the "Favorite" and the "1847 NOBLE" series are anodized. This prevents them tasting of metal. Aluminum combs are very airtight and produce a very brilliant and clear sound.
Furthermore the harmonicas from the Blues series differ in the material used for the reeds. SEYDEL is the only manufacturer to offer instruments with stainless steel reeds. The harmonica reed is a spring, and stainless steel makes abetter spring than brass, plus provides about 5-times longer life than brass reeds. The >1847 CLASSIC Low and 1847 NOBLE Low are available in extra-low Richter tunings ranging from LF# down to LLE (double low E) and provide a very sonoric bass sound.
If you don't know which key you need for a particular piece of music,
RM118 to RM469